Lock.



u. KORNSTEIN,

LOCK.k

APPLICATION FILED JUNE 5| 19|?- Patented Apr. 30,1918.

4 SHEETS-SHEET l.

U. KORNSTEIN.

,LocK. APPLICATION FILED JUNE 5.1911- Patented Apr. 30, 1918 4 SHEETS-SHEET 3.

"NIMH www u. 'KomvSTEINl L ocK. APPLICATION f lLED JUNE 5 19H.

y Patented Apr. 30, 1918.

4 SHEETS-SHEET 4.

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` portionof the i section, of a lock nannten Konnsrnm, or imw'ro,f1v. r.'

LOCK.

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To all whom it may concern:

lBe it known that l, ULRICH loRNsrnrN, a citizen of the United States, and a resident of the city of New York, in the county of New York and State of New York, have invented certain new and useful -llmprovements in Locks, of which the following is a specication.

rllhe present invention relates to locks,

and has for its main object to provide a device of this `type which is simple in construction, ecient in operation, and which can be manufactured on a commercial scale.

Another object of the invention is to produce a lock that is burglar-proof, or, in other Words, one which cannot be picked byl means of a 'blade or other instrument, from the outside.

A further object of the invention is to produce a lock having a plurality of locking bolts, one of which is actuated by means of a key, and the others by the key-operated bolt. p v

Withthese and other objects in view,

which will more fully appear as the nature' of the invention is better understood, the same consists in the combination, arrangement and construction-of partsl hereinafter described, pointed out iny the appended claims and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proseveral parts and details of construction within the scope'of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

A few of the many embodiments of the invention are illustrated in the accompanying` drawings, "1s which igure 1 is a front elevation, partly 1n with the present invention; Fig. 2 is a similar view, showing the locking bolt in its locking position; Fig. 3 is a similar view of a modified lock; Fig. 4 is a similar vview showing the lock illustrated in Fig. 3 with its locking bolt in its closing position; Fig. 5

is a similar view of a further modification of' the inventiong'Fig. 6* is a similar view of the lock shown in Fig. 5, with its locking bolt in its closing position; Figs. 7 and 8 are front elevations of ortions of modified locking bolts;

taken through a moditied lock;- Fig. 10 is Specification of Letters Patent.

` tion,

vthrough a recess constructed in accordance' Fig. 9 1s a vertical section Patented npr. so, raie,

Application med June E, 1917. Serial No. 173,025.

a similar section taken throu h the lock shown in Fig. 9, with the locklng bolts in thelr closing posltions; and Fig. 11 is a section taken on line 11-11 of Fig. 9. y

Referring now first to Figs. ll and 2 of the drawings, the numeral indicates adoor and thenumeral 21 the jamb thereof..

To the door is attached', by screws or otherwise, a lock casing 22, with which registers a keeper 23, fastened to the jamb. Within the casing is slidably disposed a lookiny bolt 251, that is made of two sections 25 an 26, pivoted together at 27. The pivot uniting the two sections of the bolt is seated in a horizontally extending longitudinal slot 23 in the lock casing, whereby the said bolt is permitted to slide longitudinally in said casing. Each section of the bolt is provided with an oblique slot 29, in each of which is seated a pin these pins being carried by the lock casing. Blade springs 31, bearing against the two sections of the lookin bolt, tend to hold the same in their closedg positions, shown in Fig. 1 of the drawings. helical spring 32, one end of which 1s fastened to the lock casing andthe other one to the locking bolt, has a tendency tok slide the said bolt rearward to its retracted posishown in Fig. 1 of the drawings. 'llhe front end of each bolt section is provided with a shoulder 33, in rear of which is iti formed in each bolt section a notch 34:. The

shoulders of the bolts are adapted to enter the keeper 23,.when the door is being closed, 35 in the front face of the recess being shown in dotted lines in Figs. 1 and 2 of the drawings. rllhe sections of the locking bolt are recessed at 36, and in this recess is dis osed an actuating cam 37, that is attached to aspindle 38. To this spindle is ysecured. on the inner side of the door a knob, not shown. The cam is also adapted to be actuated from the outside by a key, that is adapted to be seated in a slot 39 in the cam, in alinement with a keyhole,

said. keeper, said not shown. rll`he cam 37 is adapted to cooperate with a lug 40 on the locking bolt section l25.

The shoulders 33 pressed pawls 41, pivoted at 4:2 to the eeper and disposed within the same.

coact with s ring- .i

The operation of this lock is as follows:

The locking bolt is shown in its retracted position in Fig. 1 of the drawings, in which the shoulders 33 are located within the keeper and the two sections of the bolt are in their abutting, normal csitions. In order to close the door from t e outside, the

proper key is inserted into the slot ,39, and

the cam 37 turned in the direction of the arrow shown in Fig. 1 of the drawings In this manner the bolt is projected and also its two sections expanded, the shoulders 33-riding over the pawls 41, and the latter being forced by their springs into the notches 34 in the bolt sections. The bolt slides forward as far as the slot 28 in the lock casing will permit and is expanded as far as the slots 29 therein will allow. These positions of the parts are shown in Fig. 2- of the drawings.

It will be observed that, inasmuch as for the purpose of unlocking the door, the bolt sections must not only be retracted, but also brought into their abutting positions, a picking of the lock from the outside by the aid of a blade or similar instrument is impossible.

In order to retract the bolt, the cam 37 must be turned in a direction opposite to the one in which the bolt is being projected. As this is being done, the springs 31 cause the bolt sections to move toward each other, and the spring 32 retracts the same until they are brought into the positions shown in Fig. 1 of the drawings.

The modication shown in Figs. 3 and 4 of the drawings, differs from the one above described in that its cam 37 is T- shaped. The arm 43 of this cam serves to project the bolt and the arms 43 thereon to expand the same. Otherwise the construction and operation of this lock are the same as those of the device described in connection with Figs. l and 2 of the drawings.

Another modification is illustrated in Figs. 5 and 6. In this construction, the shoulders 33 of the locking bolt sections are tapered from their outer edges 44 toward their inner edges 45. The slots 29 in the locking bolt sections are substantially l.-

shaped, thereby permitting the bolt sections to move simultaneously rearward, when the tapered sections of the shoulders 33 thereof strike against the keeper 23 upon the door j amb. On the locking bolt section 25 is provided a shoulder 46, which is disposed a substantial distance in front of the cam 37, when the latter is in its normal position, (Fig. 5). 'l'.he locking bolt' can thus move backward without affecting the position of the cam.

Otherwise the construction and operation of the device is in all respects the same as those described in connection with and 2 of the drawings.

instead of pivoting together the locking joined by a spring 47 (Fig. 7), that is attached by screws 48 to the said sections, or they may Figs. 1

be united by a spring 49, (Fig. 8), that is shaped to be ke t in engagement with the locking bolt sections without the aid of special fastening means.

A further modification of the invention is shown in Figs. 9 to 11, inclusive. In this construction, the locking bolt 50 consists of two sections 51 and 51, one of the same having a longitudinal recess 52, and the other one a longitudinally reduced section 53, that is located within the recess 52, thereby permitting the said two sections to move away from and toward each other in a vertical plane. rlhis bolt is located within a mortise 54 in the door, and its sections are guided in their movements by pins 55 within the said mortise and in engagement with L-shaped slots 56 in the bolt sections. Both sections 'of the bolt are under the action of a spring 57, which has a tendency to project the same. The sections of the bolt are provided with shoulders 58, adapted to be projected into a mortise 59 in the door frame. In rear of the shoulders are formed in the bolt sections notches 60, in which are seated, when the bolt is in its projected position, lugs 61 on the door frame. Secondary locking bolts 62 extend at right angles to the longitudinal aXis of the bolt 50, their inner ends 63 bein held by springs 64 against the bolt sections 51 and 51, respectively, and their outer ends 65 being adapted to enter recesses 66 in the door frame. The locking bolt sections 51 j and 51 are recessed at 67, and within this recess are disposed cams 68, connected by links 69. To one of the cams is attached a spindle 70, similar in construction and operation to the spindle 38 described in connection with Fig. 1 of the drawings.

When the locking bolt 50 is in its retracted position, the cams 68 are in their nearly horizontal positions. If it is intended to lock the door, the cams 68 are turned in the directions of the arrow marked X in F ig. 9 of the drawings. in this direction, first the spring 57 projects the bolt 50 into the position shown in Fig. 9 of the drawings. ln further turning the cams'in the direction indicated, the two sections 51 and 51 of the bolt recede from each other, whereby the lugs 61 enter the notches in rear of the shoulders 58. At the same time, the bolts 62 are caused to move in opposite directions away from each other, whereby their outer ends enter the recesses 66 in the door frame.

To unlock the door, the cams 68 are turned in a direction opposite to the one above described, Whereby the springs 64 cause the secondary bolts 62 to move toward each other and to bring the bolt sections 51 and 51 to their normal positions (Fig. 9). A further turning of the cams then causes the bolt 50 to move to its retracted position, allowing the door to be opened.

As these cams are being turned Laeaaia The construction illustrated in Figs. 9 to 11, inclusive, is very useful in connection with safes, store doors, etc.

What I claim is:

1. In a door lock, the combination with a casing, of a locking bolt slidably arranged therein, said bolt being made of two sections each having a shoulder at its outer end, a keeper provided with lugs, and key-operated means'for expanding said bolt by causing its two sections to move away from each other in the plane in which they are slidably .arranged in said casing, whereby the shoulders on said bolt sections are caused to move in front of the lugs on said keeper.

2. In a door lock, the combination with a llllll.

casing, of a lockin bolt slidably arranged thereon, said bolt eing made of two sections, meansr for expanding said' bolt by causing its two sections to move away from each other, secondary bolts 'coperating with each of said bolt sections, said secondary bolts being projected to locking position by the expansion of said first named bolt, and

. springs coacting with said secondary bolts,

said springs belng adapted to retract said last-named bolts and cause said first-named 'bolt sections to move toward each other.

4Signed at New York, in the county ont New York, and State of New York, this 1st day of June, A. D. 1917.

ULRICH KORNS'IEIN. 

